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Finding the Fourth Proportional to 210,013.92, 315,228.24 and 91,766.88

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Solution

The fourth proportional to 210,013.92, 315,228.24 and 91,766.88 is: 137,740.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,013.92 : 315,228.24 = 91,766.88 : x
  2. Step 2: Convert to fraction form
    210,013.92/315,228.24 = 91,766.88/x
  3. Step 3: Cross multiply
    210,013.92x = 315,228.24 × 91,766.88
  4. Step 4: Simplify right side
    210,013.92x = 28,927,512,072.69
  5. Step 5: Solve for x
    x = 28,927,512,072.69/210,013.92
  6. Step 6: Final answer
    x = 137,740.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.